Telephone-exchange system.



Sf WLUW f TELEPHNE EXCHANGE SYSTEM.

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S. B, WILLIAMS. In. TELEPHONE EXCHANGE SYSTEM.

V APPLICATION FILED MAR. 3. -QII. @'pwa Patented; Feb. 25, 1919.

3 SHEETS-SHEET 2.

II-IEE u n" 1 l l W W ,yg

seminar. B. WILLIAMS, Jn., or snooKLrN, raro COMPANY, INCORPORATED, or n YORK.

NEW YORK, ASSGNOR TO WESTERN ELEC- EW YGRK, E. Y., A CQBPORATON GF NEW TELEPON/E-EXOHANGE SYSTEM.

paesana.

Specification of Letters lratent.

atented Feb. 25, i919.

Application filed March 3, 1917. Serial No. 152,230.

To all whom 'it may concern:

Be it. known that I, Sli/M UEL B. Wirf LiAMs, Jr., a citizen of the United States, residing at Brooklyn, in the county of Kings and State ofNew York, have invented eertain new and useful improvements in TelephoneeEXchange Systems, of which the fole lowing is a. full, clear, concise, and exact description.

vention, a device in the change system in rl`his invention relates to a telephone eX- which the calling line is extended to an operators position, and in which means identified with such calling line is automatically operated for the purpose of causing the indication before the operator of the number of the calling line 'and also the' charging ofthe call to such calling line1 if a connection is successfully established.

In accordance with a feature of the innature of an automatic switch .is associated with each line and is operated after la calling line is extended to an operators position to associate an interrupting dev1ce,`coinmon to a largenuinber of lines, with a condguctor leading to such operators position, which tti interruptingv device is arranged to send iinpulses over said conductor in, accordance with the designation of the calling line, such. impulses -being utilized to actuate suitably arranged apparatus for the'purpose` of indicating the number of the calling line.

ln accordance with a further feature of the invention the same apparatus identified with the line may be subsequently employed, providing a call has heen'A successfully extended to the called line, to operate apparatus to charge the call to the calling line.` This call charging apparatus may be individual to a cord circuit `at' an operators position, and may be automatically oper ated to printor otherwise mark upon a record strip ticket the number of the calling line to which the call is ito he charged.

Other features of the invention not specifically referred to above will more clearly appear from the annexed .specification and from the drawings, in which- Figure'l represents diagrammatically the apparatus and circuits associated with the cal ing line; and I' Figs. 2 and 3 represent the circuits and apparatus associated with the cord circuit in the operators position, theromplete sys# tem heing'shown with Fig. 2 at the right of Fig. 1, and Figf below Fig. 2.

The'invention is shown as applied to a system such as is disclosed in the applie cants previously filed application Serial No. 107,090, filed July l, 1916.

However, for the sake of simplicity, only so much of the circuits of the previously tiled application are disclosed herein asis necessary for `the complete understanding of ithe present invention. Those parts of the circuits of the former application which are omitted, and their relation to the presf ent invention, may be understood bv referringto such previously tiled application, Serial No. 107,090 the saine reference nu- -xnerals lbeing utilized as far as possible to designatel similar parts of the system disclosed in the vpreviously tiled application and the system disclosed in this application.

Referring to Fig. l of the drawing, there is provided individual to each line, a switch such as indicated at l. These switches are provided with `a rotatable arm 2, which is adapted to be moved over stationary terminals indicated at 4, 5, 6, 7 and 13, by means of the intermittent energization and denergization of a stepping magnet 3, the pawl operated by the rarmature of the magnet 3 being arranged to step the arm 2 forward `upon .the release of suchmagnet. Normally the arm 2 is in contact with the first stationary terminal 4f, and there are as many stationary termi-` nals as there are digits in the maximum line number in the system. For purposes of illustration, it is assumed that the number o1?. the line shown and indicated as A is 15732. There is provided common to the exchange an interrupting device indicated as a whole at 8. This interrupting device comprises ashaft 9, adapted to be driven in a* counter clockwise direction from some suitable source of power (not shown), upon`` which are mounted a series of cominutator disks. The No. 0 commutator is provided with one short conduote ing segment, followed by a long insulated segment, thel No. 1 coinmutator with two short 'conducting segments, thev No. 2 with three, the No. 3 with four, etc. The stationary terminals of the switch individual to any line are connected to brushes making contact with the particular co1nmuta.

ion

iro

, mme tima@ iiays, which @ii of which fue iiiuwi @ed @Jud terminals 'um 'id ua :o to me calling ina at 20, 2l 22 and :L @mcd Slider the brushes of which. are ndi- Cziimi it 25, 27 and 28 and teymimiia inividua-i to am idie cord ai; 29 30, and 32,

' Leen operated identically :is in Such apmi t@ cannes-1 che calling iin@ A. -cifm@ @mi m Fig. 2. soon :is brushes :i0 22E ae ini@ @Guillot Witi "5ba miiiais 2i) uit is established fol' the energia;- fim 's ll, l and 157 of me com C icuit may Hace-ii *im y i @im windings 0i' iai-lys 1.5L :mii m Miniiel (the 'brand *l* :ding of @im relay 157 passi* Y i {posiiou l) the Quinn@ card svi-lich 500) E30 s 'imi con- J man 1 and imm iiyama, by me listening key 'se/queme@ iw" i LCH 406 {possibion l), lait-hand (sami m'gif die mia); 152, conduct@ 825 ling mi' cuit-oil' relay ll. Thera? in mii 'that they @animating cizcuii zfaipiu'piiaieii, the, ihre relays ll, 'fand 7 :ai: -fa C017@ Circuit auf@ operaed. RQiajy' in liipmuing, closes ait isie. m'niziuv 'cxtzict a locking civ-Cuit foi ali cui xmnds. y 0i seqmnce s 'itch continu {posiguence switch comme@ 40G Quasi fisura i 311 6) ground. The. ihre@ relays z heid ifi-Skaai upwhiie the iizwtening; imyequence Wih is moveci {mmits imi'- posiion l to its iis Qing 'posiiaii 7". 'JMS movement @i ydie iistmiif' if; "mimmo, s\.vit--ffi1 alfiecd by gi circuit 'wiiie'ix amends Tom bam-@yy '/iii'ng'h a iawtoimaggnet m16,

C-3 (position l) ci' tho svqumico 400, cont-aci 507 {posi-imi l) and msn-iii mit Cmiaciaiii :umnime ai" mizijv t@ giouiifi,

'in leaving position l, the iiaiuingr key' Eeqmeiice switch for the @muy breaks ai cmi- {pnitiii l) the cmimeuimi of {liesiew soiiducfu'i S7 and by: may mi; @im Winiingis of iaiays lL i541 and i522 but mi@ li, ii'irpea-"iiig, ms im the memscisma', e,

'i gummi. uit, relay 152 is ffiier glazed., ai, hand z-imatum and fwn@ @mitm/J im nested. the conductor 62' iiom die brauch zlienciing by way of the ciose at contac 07 as Soon as they seque-nce switc'i'i 260 muchas position 2, and which nainaiiicd ciosaci uiifbil the sequence switch moves mit position 7'.

@cime-ois the oiemtors eiephone set and 86, e5?

e talking' conducoi's teni in y; im the iiaphoiia sat of the Caiiinf, suoscrbaif. The, cpmaftors telephone sei, Whieii is shown., is connected to th@ leads indicimad in afi; (4 and b, and from thence by Way of cfmvzicts and 51S (position ini'migh the, ummm'ss and coniiaci. si i'eiaff 31579 coiiftacs 5i@ und 5M (p0- .comuanors 85 and 86'.

' 'iewemi iii@ @puit-inria; tei@ teiepi ma @il 'the C.- Jing Sub @uw @mimi At the Same iv: pm'iousiy d @pandas to cima Rainy 157, opem- Y corniiiuftators. As will presently appear, the purpose of the relay 300 is to associate the indicating device with the switch l, individual to the calling line, so that this associa-` tion can take place only when the eoinniutator -assooiated with 'the .first terminal #l ot' suoli switch is in inactive position, and thus mutilation of the series of impulses or interruptions is prevented. 'l` he relay 300, there fore, is energized over a circuit which entends from battery through the relay 300, right-hand normal Contact of such relay, conductor 301, Contact 15 (position 7), conductor 302, and through the piek-up eonnnntator 33 to grounds rlfhe relay 300 at its right-hand armature and Contact eloses a looking Circuit for itself which extends over the eonduetor 303 to the Contact 407 (position 7) to ground. .At its left-hand armature and Contact, the relay 300 places the sloiv-operating vertical magnet a and the quielooperating rotary magnet 305 of the indicating device in series with the slow-re I lease magnet 3 of the switch individual. to the line over a eireuit which extends troni battery, through the magnet 305, magnet 304i, normal eonta't 306 of' the indicator, left-hand armature and Contact of the relay 300, conductor Q07, Contact a (position '7), lett-hand normal oontaot oi: the relay L30, eonduotor 88, oo il finder termina and ornsh line iinder brush 17 and ternxinal 20,1'1iagiiet 3, arm 2, terminal fl, through the No, l eoininntator, shaft 9 to ground. las

the terminal sl, in the ease of the number as earned, is Connected to the No. l commutator, this circuit will loe interrupted twice in quick succession, causing the rotary magnet 30.5 `to he erg-ized and energized tivice and niaintainingl the magnets 3 and'SGsi energized. The ti'o del iergizations of the magnet 305 will cause the paivl 308 to engage the ratchet Wheel 309, stepping the shaft 3l() through tivo s eps. The shaft i310, in its loiverniost position, will step the contact arm into Contact with the second terminal, and at the end of the series of tivo impulses, the magnets 30a and 3 will release. The first of suoli magnets, through its urinature and pawls carried thereby, Will step the shaft 310 one step upward, will bring the arm, 319 into operative relation with the shaft 310, and will permit the shaft 3l() to rotate back to normal. The arm 321 is held in its advanced position hy means of the paivl 'which paWl is rnoved into engagement Iwith 'the ratchet carried by arm 3551, as are also the corresponding locking paivls of the other arms and the vertical looking' paw] 311i, dueto the energization of the holding magnet 315, which magnet is energized as soon as the sequence switch 400 reaches position 7 over a circuit which extends from battery, through the magnet 315, conductor 803, Contact 407 (position 7).

lhen the interrupter shaft has made a Complete revolution, due to the release oi" the magnet 3, the arin 2 will have been nioved into Contact with the terminal 5, and the No. 5 eoinniutator will come into operation and Will result in sir; interruptions nii the eirenit which includes the magnets 3, 304: and 2305. ll'lagnets 3 and 30st are energized and held energized during the. entire series ot interruptions, and the magnet is energized and de'nergized i'or each interruption, stepping the shaft 35,0 through six steps, and Consequently moving the arni 319, which is new associated with the 310, over to the sixth Contact, in which position the arin is held by the holding pawl 320. At the teiininai'zimi of 'i series of impulses, the magnet 304 released, as well as theniag* not 3, and the pawl carried by the armature of the magnet 304 steps the shaft 310 up another et i), and brings the arm il? into operatiif'e le |lhe relation with the shaft', 310. lease of the magnet moves the arm E into association with the terminal ti, `so that when the shaft Si has made another'complete revolntion, th lilo, i' eonnnutator places impulses on the eireuit includ: the magnets 3, 304

and before Alifter eightenel-ginations of the m: f 305i, which causes the arm 31"? wped to the eighth Contact the row With which it is associated, niagnets and 304 are released, magnet 30a stepping the shaft Si@ up another step, and 1nag- `net stepping the arm into association with the terminal 7, The arm 3l?" is held in the position tov which it was set by the pavvl 318, and the arm Slt'l'is associated with the shaft 310. soon as the shaft has made another revolution, the No. 3 eoinrnutator is associated with the No, '7 terminaifanditour impulses are sent through the niagxl'H 3, 304i` and 305. is a result, the ar1n`i3l2 is moved over to the fourth Contact or the row to which it is individual, being held in such position by the pawl 316, and the shaft 310 is. stepped up another step, placing the arm 311 in association with such shaft. at the saine time, the arm 2 moved into association with the terminal 13, and after another revolution of the shaft 9, No. 2 commuytator sends three impulses to the magnets 3, 304 and 305, setting the arm Sli into oon tact with the third'contact of the row to which it is associated, in which position it is held by means of the paivl 313. lt will be observed that by a counter clockwise rotation of the interrupter 8, the last one of the series oi' short conducting segments of each of the4 several eolnniutator disks passes under its coperating brush at the same instant in the eyole of rotation. of the interrupter. By this ineans the open period of the Circuit for slow-to-release magnets 3 and 304 commences at the same point in the rotation of the interrupter for all eonirnutator calling lirW 4in ascertaining; 'troni thtl nessuna disks, and the longr insulating segment following the last conducting,r segment being sufficiently long to permit the slow magnets 3 and 304 to release and operate the switch 1 and the indicating switch, the transition from one digit to the next will occur without mutilation ot impulses, whether such transition be from a lesser to a greater numbered digit or vice versa. The shaft. 310, due to the release of the magnet 304, isstepped up still another step, and the upper end of such shaft, indicated` at 323, engages the contacts 306 and 324, opening 30G, and closing the upper contact of 306 and of 324. rllhe circuit ot the magnets 3, 304 and 305 is interrupted at the contact 306, so that when the brush il is moved into association with the next terminal, due to the de/e'nergization o' the magnet 3, no impulses will be sent in to the indicating device. The contact 324iconnects ground to the shaft S10, and from thenceto the arms 321, 31.9, 317, 312 and 311, causing* the illumination ot the lamps individual to the second. sixth, eighth, fourth and third contacts ot the respective rows, which lamps are illuminated, and indicate to the operator that the number ot the is 15732. The indicator' will stop in said position, and the lamps will continue to be illuminated until the sequence switch 400 leaves position 7, when the relay 315 is denergized, and withdraws the various holding' pawls, and permits the indicator to restore to normal.

The setting ot the indicator which has just been described, and 'which takes place in position 7 ot'sequence switch 400, takes place during the period employed by the operator calling .subscriber the number of the called line, testing such called line, and nally establishing connection with auch called line, ii? not busy. The operator, havingascertained the number et the called line, tests by insertingn the plug indicated at 170 into the jack 114, which will be assumed to be the calling jack oit the called line. `Vlhen the tip ot the plug; contacts with the sleeve oi? the flach, the test takes place. lf the line is busy, battery will be found upon such sleeve and a circuit will be extended by way of haelt contact and right armature of the relay 175 to a test relay at the operators position (not shown), the operation oi" which will notify the operator that the particular line is busy. Assuming, however, that the line is idle, the operator inserts the nplus 170 in the jaclr 114- and establishes a circuit for the relays 119, 175, and the cut-oil:1 relay 11 of the line in series. lThis circuit extends trom'hattery to relay 119, relay 175i, sleeve oi" the plug, sleeve of the jack, eut-ott' relay 11 to ground.

The relay 175 closes a circuit that extends from battery to the lnotormagrnet and con.- tact 503 (position 1) ot' the sequenceswiteh thelower contact et i .armature of the relay 325.

500, contact 413 (position 7), lett-hand front contact of the armature of the relay 175, normally closed contacts of the charge key 176 to ground, thus driving the sequence switch 500 into position 2. ln position 2 of the sequence switch' 500, a circuit is coinpleted from battery, through the motormagnet and contact 403 (position 7) of the sequence. switch 400, contact 515 (position 2), back contact and right armature or' the relay 154 to ground. The sequence switch 400 is driven out of position 7 into position 15 over this circuit, and a circuit is completed which extends from battery, through the motormagnet of sequence switc 500, contact 5041 (position 2), Contact 413 (position 8), letthand front contact and arma ture of the relay 175, and normal contact of the charge key 176 to ground, whereupon the sequence switch 500 moves into position 3. After the sequence switch 500 is moved out ot position 2 by movement of the sequence switch 4:00 out of position 7, as described above, it moves through its various stages until it reaches position 12. The intermediate positions between Z and 12 may be used to control selective ringing operations, which form no part of the present invention, and which will not be described in detail. From position 12, sequence .switch 500 moves into position 13, in which position a suitable source of ringing current is' connected to the called line for the purpose of signaling, and from position 13, the sequence switch, provided the called subscriber responds, is moved into position 17, which is the through or talkingl position. The detailed operation of the sequence switch will not be described, as it is suflicient for the purpose ot the present inven tion to assume that the called subscriber has responded, that the sequence switch QO has reached the through or talking position 17, and therefore that the connection is successfully established. The operator ascertains from the usual supervisory si anal that. the chill has been successfully completed, and then operates the charge key indicated at 176 tor the purpose ot charging the call to the calling; line. The operation ot this lrey, provided the call has been successfully established, and hence the sequence switch 500 is in position 17` establishes a circuit `tor the relay 15G. which circuit may he traced from battery through-the relay 156, contact 509 (position 17). key 176 to ground. The relay 156, at its lett-hand armature, establishes a circuit (intending7 trom the identifying switch oi the calling line to the call-recording device, which circuit, however, is normally open at the bach Contact and left llowever, 'the operation oi the charge key 176 also establishes a circuit tor the start relay 3% of the call-charging' device, which circuit exkes 'l il .the urs/be of to.

'tends from bsttey, through the relay 526, conductor 327, and the Contact and charge key 176 to ground. The reley 326, et its lett-hand armature, establishes a locking circuit for itself, which extends from but tery, relay 326, left-contact and armature thereof, back contact and right-hand ermeture of relay 328, back contact of relay 339 to ground. it its right-hand armature, the relay 326 connects the relay 325 into operetive relation with the pick-up interruptor which operates, as in. the cese of the indicator device, to establish va circuit for the relay which circuit extends from bettery, relay 325, normal contact of such relay, right-hand ermsture and Contact of relay conductor 302, pick-up commutetor to ground. The relay 325, when energized over this circuit, places the magnets 3, 329 end i330 in series'with the No. com`1 inutstor, over s circuit which extends from battery, left-hand armature and beclecontact ofthe reley 328, magnets 330 and 329, left armature and` Contact of the relay 325, conductor 533i left-houd armeture'eud conrect of relay loo, conductor 88, terminal 32, brush :28, brush i7, terminal 20, magnet 3, arm 2, terminal il, to the No. l commutetor and grmuids IThe switch indicated et l Will operate identically es before to successively esseci e the No. l, 5, .7, 3 end 2 commutatore with this mit. The relay 329, which., ss sha n, .u .y be uti :d to position @type wheel or other in king device, responds once for erich impulse, and. the magnet 330, which is slo"'ecting, will release at the end ci each se. es of impulses and such release be utilized to shift the switch indicated either for the purpose of associating the 325.5 with another recording derice, or the' release of such magnet may be utilized es shown to bring tile record strip u1 contact4 with recording mechanism, tud to feed the re ord another step. After tive se- Aupulse" und hence citer c culling' line has loeeiorecosd brought ation T/vth the last contest end "cuit is established for magnet 330 which in turn c" )ses a, circuit for the release magnet 23:28, W.' ch circuit extends from battery, through the magnet 32S, armature und iront Contact of magnet 330, contact of the switch 332 Ysind arm thereof to ground. Relay 328 opens at its right-hand Contact the previously traced circuit for the relay 325, which releases end opens e circuit to the ceiling line. li/'lieu the relayV 328 is em ergized, thc magnet 33d yderiergises und moves the switch 332 into its normal position. lThe relsy 328 is maintained enerifized oyer e ground et the beck contact of the reley 339,'but this circuit is only maintained fo:- s short timems the relay 339 is energized over e' circuit through the letherid emes a of the switch 332 is ues/sees control the indicating device to indicate to the operator the number of the calling; lise, end being operated the second time if the call is successful, and only if the cell is suc cessi'ul, to make a. record for the purpose of charging the cell to the calling line. The rst of these operations takes place entirely automatically without any 'uct ou the per-t' ofthe operator, and the second in response to the operetors manipulation of the charge key.

lll/That is claimed is:

l. ln s telephone exchange system, e celling line, en operators position, Ineens whereby seid line may be associated with seid position, an indicating device'et seid position arranged to be operated in response to impulses, a recording device et lseid position arranged to be operated u1- respouse to' impulses, an impulse producing; device com? mon to s number of lines, Ineens individuel to each line for automatically essocietiiog;`A

the common impulse producing' device withv the indmetmg device, and Ineens operative sit-er the operstion of seid indicating de vice for operating seid llest mentioned ineens to automatically associate the impulse pros ducing device with seid recording device;

2. ln' a telephone exchange system, e. delling line, an' operator-s position, means Wherebyssid line may be associated with wel seid position, an indicating devi'ceeid e, f

cell-recording device at such position, e coutrol circuit, means individuel to the line impressing e trein of impulses identifying; the line on said control circuit, meensfor associating theindiceting device with the control circuit whereby suchindicsting des--` Vice may be operated to indicate the number operative only in cese the calling` line is ox ll of the calling line, u celled line und means tended to the celled. line, for associating the;

cu-ll-recordin device with the control circ it whereby suc call-recording: device may e operated to record e coll ou suchcellngg line.

3. In a ing line, en operatorie pcsitom "messie ltelephone exchange system, :spelln whereby said lines-.my be associated 'with seid position, e celled lise, ineens controlled at said position fornextending seid calling line to seid celliedyvline, su uidicstuig deylce at. such position operated when seid'csluug line is essccieted with .seidpositiori rior-,

identifying the cel-ling line, and s recordisgg;

device nc siici position operative 'when said culling lino is extended lo the czillcdline lor recording n cali' on such calling line.

i. 'ln n telephone @Xchange System, culling' line,:\n operatoria posiition. nrcanl \.\licrch v such lino may hc cxtindod to suoli position, zi cnllrccording dcvice it suoli positionr` inonns ni thc posilzion hereby such recordinnr dcvicc inziy lio nssocintcd with thc cull;- ing linc incluis individual to ho calling liuc. 'for operating the rcfcording dcvice in accord- ;iucc with he designation of hc culling line7 und incnns for preventing hc association of such call-recording; devicc wih flic cullingv lino if the coll is unsuccessful.

in zr telephone @Xchange J \':-lc`1n, :i culling line, zur oporutofs positioin means whereby such lincv nruy lio cxtciided izo such position. a recording` device :it flic position arranged to bo operated in responso to n rnin of impulses l'o record 2i nunibcr idcntifind by'snoli train of impulsos. :in impulsoproducing device common io n plurality or lincb` comprising` n plurality of inici-rumors ouch individual interruptor' producing ii diflicrcnl: nunilicr of impulses, und :1 switch individual to thc lino Jfor auton'nilicnlly asso ciating cci-tuin or' said in'errupters with suoli recording device.

(. ln n clcplionc exchange system, n callingr 'linnTy :in opcriitors poeition, incluisf for cxtcndingr 'lid sailing lino to said position, :in indicirini device, und ai cull recording dei'icc ad; such position5 n control circuit@ inclina, individual io alle calling lino for iinpycshii n train of impunes identifying iio iiiio on Suid control circuit, i culled lino, means opcrnlivc when :mid culling line is cxtondod im sziid operator@ poilzion for nosociaring sind coinirisinv a ilurilitv oi imcrrnn'iorsi n C Ininnlicr of the cillinfg line and .Suid culled liinx Aior associating said woord ing dcvico with Amid control circuil for op@ ating sai'id recording devicc lo record call, on said calling line.

i'. in 'fr elcplionc exch-fing# r, lcni, cailing line, an. opcrnzors powliion, nuuin Whcrcby sind lino may he exl'cndcd lo position, ai conrol circuitta n recording` dw. v :it 'dio position arranged o hc oni-inland in response to i1 train of impulso oir-r l conrol ci; :nil io record a nu; by such trziin of impulses, in impor fro dui-ing' dcvicc common. io a piurziiizy or lines .swilch individual o the calling line :uitoinnticzilly zissociaing Cerwin of .inici inrerruptcrs wirh said control circuit and :in operating magnet for said #Witch in ,said control circuit.

t5. ln n telephone syseni, ii collinaI operators position, Amenno for ci nid culling: lin@ to said position, :in indicanu ing dci'icc. und o. call rccordini;- doris@ si nich position, moans individual llo the reali ing line for producing successive of impulsesA identifying said calling' `liiie and moans Jfor su' cossirly nsiociating said indio cziingr und recording' devices with smid impulnc prodnoinU means for indicating' recording ai call on Said culling imc.

in' witness w ierco lierounzo s iiiynnnie #this 2nd day of liiircii, fr. .J.

SAMUEL B. /VHLL n, 

